Built-up pneumatic tire.



P. TRUDEAU.'

BUILT-UP PNEUMATIG TIRE.

APPLIUATION PILED JULY 2s, 1908` Patented NOV. 1

PeZezw @Cigala Tol all rwhom 'it concern.l

vcontinuing application 4patent on mater'lal for and method of-'mak- "UNITE srnrns IEELIER- TRUDEAU, 0F SANTA ANA, CALIFORNIA.

' BUILT-Ur :PNEUMTIC TIRE.

Be it known that I, PETER TRUDAU, a citizen of the United States, residingA at Santa Ana, in the county of Orange and State of California, have inventeda new and useful Built-Up Pneumatic Tire, of which the following is a specification.

The object of this invention is to provide a pneumatic tire for automobiles and the like, which will be a superior substitute for the india-rubber tires and substitutes therefor, heretofore in use. I v Points of superiority aimed at are durability, cheapness, strength, safety, antichafing and antiheating of the pneumatic tube; firmness, non-stretchableness, security against slipping from the clench.

This invention relates to the outside shath or tirefor inclosing the usual inner tu e.

No claim is made herein to the specific novel material or method herein specified, as the same are-claimed in a copending and for United States ing built-up pneumatic tires,'Ser ial Number 585,511, filed October 5th, 1910. The accompanying drawings illustrate the invention.

Figure 1 is a broken view of a detached tire constructed in accordance with` this invention. Fig. 2-is an enlarged cross-section of a fragment of the' same clenched on a .wheel-rim. -The inner tube is shown in place, Fig. 3 is a view of a fragmentof the tire detachedand without an llnner tube.

VThe tire is constructed o leather, ysailcloth, cement, and Wire-cable, and the leather is subjected to specific treatment in orderto take out formed over a form, not shown, andthereby given \the necessary hollow' annular shape, and is afterward allowed to dry wh1le tightly stretched thereon se asl to retain its shape. After the 'completed tire is fully dried, it isl subjected to a water-proofing ."treatment s o as to preclude the liability of becoming soft though'continually soaked in .-water for a long period, as may occur in ,practical use.

' The Water-proofing treatment consists in the outside of the completed tire in which has previously been leather is 'subjected to the bath has 'a temand superior' 'be available or convenient, an

all the stretch, and is 'then` specification of Letters Patent. Patented Nov. 1, 1910. Application inea .my 2s, isos. serial No.

perature of about 100 Fahrenheit; the tire being allowed to soak in such bath for about 'siX hours, and being'rolled about in the bath of Waterproofing material from time to time so as to coverthe outside of the tire.

I will no w describe the method of preparing the leather before the same is stretched upon the form. The leather preferred is heavy, chrome tanned leather, of say about inch more or less thickness. The same is,

to be soaked in a preparation of flax-seed, water and Irish moss, which is thoroughly boiled together before the leather is soaked therein; about equal parts of flax-seed and Irish moss being boiled in thewater until it is brought to a syrupy consistency, and allowed to cool'to about 100 Fahrenheit. The leather will vbe placed in the preparation while the same 1s at a temperature of about 100 Fahrenheit, -and w1ll be kept therein until it is thoroughly soft and pliable. Previous to this the leather should be cut into strips of appropriate width to form the tire, and of such len hs as may if a single piece of leather is not long enough to go around the tire, two or more pieces should,

be cemented together to make a strip which will be lon enou h to extend fully around the. tire an ylap or cementigwogether at the ends. The ieces for each strip maybe cemented together with any well-,known leather cement, and allowed to become set before being soaked.

After the leather strips have been thoroughly soaked and sufficiently softened, the same will be stretched lengthwise by mechanical means, as levers,-not shown,--until all the stretch has been taken out in that direction. `Then the strips will be ready to be stretched upon a form, not shown. The form for this purpose may bemade in a number of 'sections in a well-known way;

'the same being put together and secured by screws and readily detachable from each other so as to be withdrawn from the tire whenthe tire is completed. l

When the leather strips have all been thoroughly softened, then a strip 1, of No. 1 sail-cloth suihciently long to extend entirely around the circumference of the form and sufficiently wide to extend entirely around the form and to lap over on the inside thereof, and slitted to prevent obstructive creasing, will be applied to the form and lapped n the inner slde thereof, allowfI approximately Ito the place where the edge of the tire is to be when completed.; the same being in position' to firmly rest on the clencher which will fasten the tire to the rim lof the wheel when the tire is in use. Then a coating of cement will be' applied to the outside of said sail-cloth, and-a strip 2 of the soaked leather pieced or unitary, as4

the case may be, and long enough to extend around the .circumference of the form and to overlap tolform a splice about four inches'or more of lap, and shaved at the ends in the usual way toform an even thickness-v when spliced, and wide enough to reach around the form from edge to'edge ofthe proposed tire,-will then be applied tosaidr form,-not shown,-and stretched, aroundthe same until all the stretch is taken out and the edges of the leather strip come to-`- at the inside of the gether, or nearly so, form all around the inside circle thereof. Then apply a coating of cement to the outside of the leather strip thusv formed, and then apply a-second sheet, 3, o'f No. 1 sailcloth to the cement-coated leather, and draw the same tight. In each instance the sailcloth will be slit by slits t so that there will be no puckering or creasing of the sailcloth, and the same'can be brought tightly and smoothly into place. This second sheet of sail-cloth will then be covered with a. coating of cement and astrip, 5, of' thel soaked leather suiiiciently long to' go entirely around the circumference of the tire, and shaved atl the end to make a smooth splice, and also shaved-to an even edge n each edge, and being of a width to coveral little more than half of the face of the tire from side to side, will then be applied and stretchedtightly over the cemented surface. In each instance the ends of -`the leather stripswill' be lapped together and cemented with leather-cement at thein ends `after they have been thoroughly stretched into place. After the leather strip 5 has thus been spliced in place, the body of the tire thus formed will be coated with cement on the outside, and two circular sole-leather welts 6 of wedge shape in cross-section will be appliediat that portion of the tire thus constructed which is to form the'open edges of the tire. These welts will be tacked in place temporarily, and then two wire cable rings 7 and 7 which are preferably about 2f inch in diameter and formed of thin steel wire strands twisted together, are brought against the tire at the edges thereof and against the Welts that have been tacked in Then the body thus formed .will be coated externally with cement, Iand then the final outside strip 8 of stretched and softened leather will be applied and stretched aroundthe tire" and ever the Wires and wedges, `and brought tightly into position.

Then the leathers will be stitched across the opening in the tire to hold the leathers rmly in place temporarily until the same have become form, not shown, will be removed, and then stud-headed rivets 9 will be driven through and clenched on the inside to form a nonskidding, armored tread for the tire. Then the inside sail-cloth lining or coating 1 will be coated with cement, and then a strip 10 of sail-cloth will be fitted tightly and smoothly inside the tire thus formed, in order to protect the innery rubber tube from the effects of rusting or chafng of the( studs. The inside lining of sail-cloth will lap across the o ening to close the same. Then each edge of the hollow tire thus formed will i v,be sewed entirely around through all the thicknesses of leather, excepting the narrower one which does not extend to the edges of the hollow tire, and also through the welt, -'thus forming a closed edge on each side of dry. When thoroughly. dried, the

the opening through which the form, not f shown, has been removed.

1l desi nates the stitches.

The ca le rings 7 and 7 ,are within the periphery of the rim 12 of the wheel, the

welts lbeing stillinside of these rings, and

said welts and rings serve to thicken the edges of the tire, thereby holding the edges of the outer layer 8,` of leather outwardly and forming the clenchers 13 to hook into the rim 12 and hold the tire firmly`in place. These metallically reinforced and enlarged clenchers are of great importance in holding the tire'rigidly in place. I-Ieretofore 'it has been the practice to form the clenchers by thickening the vulcanized rubber, thus producing a softer effect as Ycompared yto my rigid effect. The sections o'f canvas serve to hold the leather from stretching and also strengthen the band between the sections of leather. I desire also to call especial atten.

tion to the rivets 9. These rivets have two prongs driven entirely through the three leather layers heads of the rivets are broad and flat so as to set well upon the outer surface of the tire, and the two prongs are held more firmly by the ent-ire body of hard leather than they would be held by one or two thicknesses of the leather.

Thus I have produced a built up tire having the strength and resiliency of three layers of leather thoroughly cemented together so seams or joints, and having clenchers in which' the strength and firmness of metallic l of the tirefand clenched. The

as to form a strong resilient body, without rings is added to two layers o'f leather and leather welts with layers of canvas sewed and cemented `into a resilient mass of great strength and durability.

I claim: 1. The built-up tire set forth comprising a canvas strip, a non-stretchable leather strip non -stretchahle leather strip containing Wax on said canvas strip, cement binding the i strips together', a second canvas strip upon i the leather strip, a second non-stretchableleather strip of less Width than the first leather strip, its edges being tapered, cement securing said second leather strip upon the centeiof the second canvas strip, a third and pitch and cemented upon the second leather strip and the canvas stretched thereunder, rigid means to hold the edges of the last-mentioned 'leather strip outward to form clenchers, a strip of canvas upon the inner canvas strip and longer at one edge than. at the other edge so as t0 loop over onto the other edge, stitches securing the strips together at the edges, studs extending through the center of all the Strips except the last-mentioned strip, and suitable means binding the clencher edges together.

L. A tire composed of canvas strips and l leather strips arranged in layers, cement he.- tWeen the canvas strips and leather strips, a filling of beeswax, Burgundy pitch and tury'pentine in the outer leather, cement securing the strips together, Wires at the edges of the strips to form clenchers, and stihes fastening the edges of the strips together.

In a built-up tire, the combination With layers of canvas of dierent Widths, of leather layers of ditferent Widths, the outermost of said layers containing Wax and pitch, all cemented and stitched together and provided .with clencher-edges.

In testimony whereof, I have hereunto set my hand at Los Angeles California, this 9th day oir' July, 1908.

PETER TRUDEAU.

In presence of JAMES R. TOWNSEND,

L.BELLE RICE., 

